Cheapest return flights from Seoul to Singapore in September from $347

Best time to book flights for Seoul (GMP) to Singapore (SIN) flights at AirHint

AirHint found the following cheapest return flights from Seoul (GMP) to Singapore (SIN) in September 2025 (see full year).

Return flights

18 Sep - 23 Sep Jeju Air
16 Sep - 21 Sep Jeju Air
17 Sep - 24 Sep Jeju Air
02 Sep - 07 Sep Jeju Air
03 Sep - 07 Sep Jeju Air
25 Sep - 30 Sep Jeju Air
11 Sep - 14 Sep Jeju Air
09 Sep - 18 Sep Jeju Air
13 Sep - 19 Sep Air China
06 Sep - 10 Sep Air China
25 Sep - 02 Oct Jeju Air
30 Sep - 03 Oct Peach
24 Sep - 06 Oct Jeju Air
29 Sep - 06 Oct Air China
30 Sep - 11 Oct Peach

Also check the deals for one-way flights from Seoul to Singapore in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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